The discovery of interstellar object 3I/ATLAS coincides with SETI's proposed new post-detection rules—raising public fears of ...

A recent theory proposed by a NASA scientist suggests that extraterrestrial civilizations may not possess the wildly advanced ...

Good thing it didn’t take too much longer, however—for in around 5 billion years’ time, the sun will start to run out of fuel ...

This is the last of three blog posts associated with this week’s episode of Cosmos: A Spacetime Odyssey, which addresses life in the universe. Read the first and second here. Someday, in the not too ...

The exoplanet, dubbed GJ 251 c, is at least four times larger than our own planet and is likely to be a rocky world located ...

Earth" less than 20 light-years from our own planet is offering scientists new hope in the hunt for other worlds that could ...

The newly discovered world is called GJ 251c and it is a super-Earth orbiting a red dwarf star less than 20 light-years away.

NASA’s discovery of potential evidence of ancient life on Mars means “our galaxy could be teeming with life,” says a ...

Panic and speculation rise as reports of 'two moons', UFO sightings, and the interstellar object 3I/ATLAS spark wild theories ...

This new series highlights on-the-record conversations that didn’t make it into the published feature, with text directly ...

Keck II telescope observations of interstellar object 3I/ATLAS found "evidence for a puzzling anti-tail extension" pointing ...

Is anybody out there? Probably. Most stars have planets; we've discovered more than 6,000 exoplanets thus far, and the most ...